Assessment of MPPT Techniques During the Faulty Conditions of PV System

Bhukya Krishna Naick,Kalyan Chatterjee,Tarun Kumar Chatterjee

doi:10.15598/aeee.v16i1.2581

Bhukya Krishna Naick, Kalyan Chatterjee + Show 1 more

Open Access

https://doi.org/10.15598/aeee.v16i1.2581

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Abstract

The contribution of Distributed Generation (DG) systems like wind energy systems and solar Photovoltaic (PV) systems on the generation of electricity has increased. Out of these DG systems, the PV systems have gained wide popularity, because of the availability of solar energy throughout the day. Depending on the size of PV installations, a large number of PV modules can be interconnected in the form of series and parallel connection. Since a large number of modules are interconnected, it is possible for the faults in a PV array to occur due to the failure of protection system, which can cause damage to the PV module and also the decrease in the output power. This paper presents the tracking of a maximum power point under the faulty conditions of 12x5 PV array. The fault conditions that have been considered in the PV array are open circuit fault, line to ground, line to line and failure of bypass diodes. Perturb and observe, incremental conductance and fuzzy logic controller are the maximum power point tracking techniques that have been implemented. For each of the fault conditions, the results have been presented in terms of the maximum power tracked, tracking time and tracking efficiency.

Highlights

The extensive research work in the area of solar Photovoltaic (PV) cells has improved their efficiency and reduced their cost
When an open circuit fault occurs in any single string, the whole string gets disconnected causing the reduction in the output power of the PV array [8]
The thermal voltage Vt in (V) of the PV module is given by Eq (4): The purpose of the MPPT technique is to compute the suitable duty cycle for controlling the switch present in the converter

Summary

Introduction

The extensive research work in the area of solar Photovoltaic (PV) cells has improved their efficiency and reduced their cost. Due to the working of some of the cells in dark conditions, the bypass diode gets activated, causing the reduction of the output voltage of the PV array [8]. The MPPT controller has been designed to drive the PV array at maximum output power at any operating conditions [1] and [10]. It helps in protecting the power electronic devices by reducing the fault current during faulty conditions. Many MPPT techniques can be found in the literature These have been implemented to drive the PV array at Maximum Power Point (MPP) under partially shaded conditions or mismatch conditions (one of the fault conditions). The performance of MPPT techniques during the faulty conditions of PV array has not been found in the literature except the partially shaded conditions

Modeling of PV Module

Maximum Power Point Tracking Techniques

INC Method

FLC Method